Bicycle helmet



FIG. 1 is a perspective view of the bicycle helmet;

FIG. 2 is a right side view of the bicycle helmet of FIG. 1;

FIG. 3 is a left side view of the bicycle helmet of FIG. 1;

FIG. 4 is a front view of the bicycle helmet of FIG. 1;

FIG. 5 is a rear view of the bicycle helmet of FIG. 1; and,

FIG. 6 is a top view of the bicycle helmet of FIG. 1.

The broken lines depict portions of the bicycle helmet that form no part of the claimed design. 

CLAIM The ornamental design for a bicycle helmet, as shown and described. 